https://pixabay.com/nl/illustrations/vintage-stoommachine-stoom-machine-4273092/
https://pleinm.digitaal.noordhoff.nl/home/ibookviewer?iBookId=1ac531e8-2619-42fd-9b6b-c7ffe18f8df2
https://padlet.com/0980973/9f4xqv4ogv4isk4b
https://www.mindmeister.com/nl/1761025337/wat-is-het-verschil-van-vroeger-en-nu
https://quizlet.com/_9c6kem?x=1jqt&i=2xoxhc